Container



2 Sheets-Sheet 1 CONTAINER F. J. DOLAN Filed July 17 1951 Dec. 12, 1933.

INVENTOR 9 i /k BY ATTORNEYS Dec. 12, 1933 J. DQLAN I 1,939,339 CONTAINER I Filed July 17 1951 2 Sheets-Sheet 2 INVENTOR 71.47 3/ BY "72; him/ w ATTORNEYS Patented Dec. 12, 1933 UNITED STATES PATENT OFFICE T CONTAINER Application July 17, 1931. Serial No. 551,412

4 Claims.

rim of accurately regulated inside diameter adapted for use with a friction top, for containing articles such as shells which require strength and accuracy of inside diameter for supporting and enclosing the shells.

In cardboard containers for large shells used for ammunition it is important that the container have its end reinforced so that it has strength enough to support the shell from its rim and that the reinforced rim shall be of proper interior diameter to center the shell properly and hold it from movement. It is-also important that such containers with their rims have the correct outside diameter for enclosing the end of the container at the head of the shell. For friction top containers it is also important that the reinforced rim have an accurate inside diameter for receiving the friction top'so as to hold it secure but removably in place.

The present invention provides an improved construction of reinforced rims for cardboard containers well adapted for the purposes above mentioned and for other purposes; and the invention also includes an improved method for making suchreinforced rim containers.

The improved containers of the present invention have a reinforcing rim of accurate inside diameter which fits over one end of the cardboard container, pressing tightly against the in side of the container and having a double crimped outer portion which compresses the paper or cardboard and holds the rim securely in place, the outside diameter of the rim on a container used for a shell corresponding to the outside diameter of the container.

The invention will be further illustrated and described in connection with the accompanying drawings, in which Fig. 1 shows a container central section with a friction top secured thereto;

Fig. 2 is an enlarged cross section showing the reinforced rim;

Fig. 3 shows a complete enclosed therein; and

Figs. 4 to 11 inclusive show successive stages in the manufacture of the reinforcing rim.

The container illustrated is a multiple ply paper or cardboard container made up of a series of layers cemented together by a suitable adcontainer with a shell hesive, The cardboard container 1, with its plies of paper 2 has the reinforcing metal rim 3 applied thereto in the manner hereinafter described and also, as shown in Fig. 1, has a bottom 4 suitably secured thereto. In Fig. 1 the container is shown with a friction top 5 secured in place in the reinforcing rim. The rim itself, as illustrated in Fig. 2, has an outside diameter substantially the same as that of the main portion of the cardboard container, this rim being made as hereinafter described. The rim fits snugly against the inside of the container-so that the inside diameter of the rim is smaller than the inside diameter of the container by the thickness of the metal, thus making a full opening at this end of the container.

In making the reinforcing rim I start with a sheet of metal 6 such as shown in Fig. 4, and stamp from this a circular section which is drawn to the shape shown at '7 in Fig. 5. The central portion 8 is then cut from this piece as shown in Fig. 6 and the inner edges of the remaining rim are drawn to a taper as shown at 9 in Fig. 6 This taper is important in permitting the rims to be inserted in the end of the cardboard container without cutting or injuring the cardboard. The rim is now ready to insert in the end of the cardboard container.

This rim '7 is then placed on the end of the container 1 and a chuck 10 is inserted as shown in Fig. 7 and forced down as shown in Fig. 8 to draw and expand the tapered rim so that it is forced against the inside of the container. The outer edge of the rim 7 is then rolled by the roller 11 into the form shown in Fig. 10 and is then again rolled by the roller 12 to give the rim the final shape shown in Fig. 11. This double rolling of the outer edge of the rim gives it a double turn which causes it to compress the end of the cardboard container and to clamp this compressed paper or cardboard so that the rim is firmly anchored and held on the end of the container without cutting it. The double rolling of the outer edge of the rim makes the outside diameter of the rim conform with the outside diameter of the container. The tapered portion at the bottom of the rim when inserted, as in Fig. 7, presses against the paper or cardboard and fits snugly against the inside diameter of the container. The double rolling of the outer edge of the rim also forces the rim in against the paper or cardboard to compress it sufficiently so that the outside diameter of the rim when completed will be flush and in line with the outside diameter of the container.

The accurate drawing of the inside of the rim makes it possible to use a friction top such as shown at 5 in Fig. 1 and obtain a perfect fit by this top which can be held in place sufficiently by the friction fit to avoid possibility of accidental removal while nevertheless permitting the friction top to be removed by applying sufficient force.

Where the container itself is not to be enclosed within another container, it is not so important that the outer diameter of the rim shouldconform exactly with the outer diameter of the cardboard container and it may project outwardly therefrom as a slight bead, but the double rolling of the outer edge of the rim should be sufficient to compress the end of the cardboard container so that it will be held tightly in a compressed state between the inner and outer portions of the rim. In this way a full opening is obtained at the top of the container which is important for many purposes and this full opening is moreover accurately controlled by the drawing operation.

A complete container for enclosing ammunition shells is shown in Fig. 3 where the shell itself is indicated at 14. In this case the container 1 with v the reinforcing rim 7 is open at the bottom and the container with the shell in it is enclosed in an outer container; A loose support 15 is located at the bottom of the container and a lining sleeve 16 is also inserted around the lower portion of the shell. The lower portion 18 of an outer container is also placed around the container 1 and a bottom closure 19 suitably secured thereto.

An upper member 20 and a top 21 is then placed over the end of the container "1 and a final layer of paper 22 may then be added to hold the top and bottom members together.

In Fig. 3 it will be noted that the rim 23 ofthe shell rests upon the reinforced end of the container l and is supported thereby. It. will also be seen that the shell is a close fit within the reinforcing rim 7. The accurate regulation of the inside diameter of this rim enables the shellto be tightly fitted therein and held-thereby.

It will also be seen that the outer diameter of the rim 7 in Fig. 3 conforms to the outer diameter of the container 1 so that the cover member 20 can fit tightly against the rim '7 and against the container 1 with a friction fit. This enables the cover member 20 to be applied with as close a fit as if the container 1 had no reinforcing rim but it obviates the difficulty of applying the cover to an unreinforced end of the container 1. If the container 1 was without any reinforcement, the paper or cardboard would be readily .deformed in handling or by theintroduction of the shell or by the weight of the shell after insertion or by the outer cover when placed thereon. But by providing a reinforced end of accurately regulated inside and outside diameter the end of the container is reinforced, the shell can be easily placed therein, and supported thereby, and the cover can then be placed thereon without difficulty and the shell itself can be properly supported without injury to the end of the container. In this case the entire shell can be supported from the rim even though the shell represents a heavy weight to be thus supported.

in place in such a .way as to avoid accidental removal without destroying the end of the container. It will also be seen that the invention provides such an improved reinforcing rim for a container the outside diameter of which conforms to the outside diameter of the cardboard container itself which is adapted for use where the container itself is enclosed in outer containers which require a close and accurate friction fit on the outside of the container.

I claim:

1. A cardboard container having a side wall and a reinforcing metal rim engaging the edge portion of said wall, said rim having an accurately drawn inner portion contacting with and fitting snugly against the inner surface of said wall and affording an unobstructed opening into the container and having a rolled outer portion bent back upon itself and forced inwardly to a position which compresses the edge portion of said wall between it and the inner portion of the rim to a thickness which is less than the original thickness of said edge portion of the wall.

2. A cardboard container having a side wall and a reinforcing metal rim engaging the edge portion of said wall, said rim having an accurately drawn inner portion contacting with and fitting snugly against the inner surface of said wall and afford ing an unobstructed opening into the container and having a rolled outer portion bent back upon itself and forced inwardly to a position which compresses the edge portion of said wall between it and the inner portion of the rim to a thickness which is less than the original thickness of said edge portion of the wall, the outer surface of the rim being flush with the outer surface of the container.

3. A cardboard container for shells having a cylindrical side wall and a reinforcing metal rim engaging the edge portion of said wallsaid rim having an inner portion cont-acting with and fitting snugly against the inner surface of said wall, said inner portion of the rim being accurately drawnto a circle and affording an unobstruucted opening into the container to receive the shell and hold it tight, the outer portion of the rim being rolled to a diameter corresponding with the outer diameter of the container and forced inwardly to a position which compresses the edge portion of said wall between it and the inner portion of the rim'to a thickness which is less than the original'thickness ofsaid edge portion of the wall, said container being adapted to support a.

heavy shell by its rim from the reinforced rim of the container and to accurately center the shell therein, and said container having an outer cover enclosing the shell and the upper portion of the container and having a close friction fit thereon.

4. A cardboard container having a side wall and a reinforcing metal rim engaging the edge portion of said wall, said rim having an accurately drawn inner portion contacting with and fitting snugly against the inner surface of said wall and affording an unobstructed opening into the container and having an outer portion which is bent backupon itself 'so that the edge portion of said wall is clamped between said inner and outer portions of the rim, the wall of the container initially being of uniform thickness but the edge portion thereof being compressed to a reduced thickness by the inner and outer portions of the rim such that the outer surface of the rim is flush with the outer surface of the container.

FRANK J. DOLAN; 

